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| Part Number | ISL9444IRZ | ISL9443IRZ | ISL9444CRZ |
|---|---|---|---|
| Manufacturer | Renesas Electronics America Inc | Intersil | Renesas Electronics America Inc |
| Product Status | Active | Obsolete | Obsolete |
| Output Type | Transistor Driver | Transistor Driver | Transistor Driver |
| Function | Step-Down | Step-Down | Step-Down |
| Output Configuration | Positive | Positive | Positive |
| Topology | Buck | Buck | Buck |
| Number of Outputs | 3 | 3 | 3 |
| Output Phases | 2 | 2 | 2 |
| Voltage - Supply (Vcc/Vdd) | 4.5V ~ 28V | 4.5V ~ 28V | 4.5V ~ 28V |
| Frequency - Switching | 200kHz ~ 1.2MHz | 600kHz ~ 1.2MHz | 200kHz ~ 1.2MHz |
| Duty Cycle (Max) | - | - | - |
| Synchronous Rectifier | Yes | Yes | Yes |
| Clock Sync | Yes | Yes | Yes |
| Serial Interfaces | - | - | - |
| Control Features | Enable, Frequency Control, Phase Control, Power Fail, Power Good, Soft Start, Tracking | Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking | Enable, Frequency Control, Phase Control, Power Fail, Power Good, Soft Start, Tracking |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 0°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 40-VFQFN Exposed Pad | 32-VFQFN Exposed Pad | 40-VFQFN Exposed Pad |
| Supplier Device Package | 40-QFN (5x5) | 32-QFN (5x5) | 40-QFN (5x5) |
